Please help I am timed

The diameter of a table is 5 feet. what is the circumference

Find all the values of x that make 0.1x + 0.25(102 - x) < 17.10 true.

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable